Timed Key Repeat, With Variable Timing

[nkormanik]

The present program I use to read epubs is Calibre Viewer (CV). Seems about the best currently available for Windows.

CV lacks a particular ability that I'd really like to have. Maybe someone here can come up with a solution.

CV allows user to select keys for various actions. Enter, for instance, can be used for Page Down.

I'd like the following:

Upon execution of the mini-program, perhaps via desktop shortcut...

(Program must remain focused on CV, by the way (possibly user selectable, for other programs, like Acrobat, Word, Edge, Chrome, etc.?). Not focused on program itself, desktop, etc.)

...Press Enter (specific key possibly user selectable) repeatedly, with a particular amount of time between each press, say, 5 seconds (possibly user selectable).

(The above can easily be done using a standard macro program. I use Macro Express.)

(Here is where things get really tricky, and coding expertise is required.)

While this repeat-Enter process is going on...

Press the keypad (-) key to slow down the process. Say, for instance, by 5%. (Possibly user selectable.)

Press the keypad (+) key to speed up the process. Say, for instance, by 5%. (Possibly user selectable.)

Continue on with the repeat-Enter process for a user selected time. Say, for instance, 5 minutes.

After completion of the above, open a small window center screen that says, "Rapid Reading Time Completed!" (or, possibly user selectable text message.)

Upon closing the small window, the program terminates entirely.

Any thoughts or suggestions greatly appreciated.

Nicholas Kormanik